We've gone for full external acrylic render (Dulux Accratex 951 Coventry Coarse) and asked about Accrashield 955 top coat. We've been given a provisional cost of $22m2 which, by my calculations, is going to be around $5000. Bearing in mind the cost to upgrade to full, external, two-coat render is only $1900, this seems extremely expensive for one more coating.
Has anyone done a 3 coat acrylic? Do the benefits justify the outlay?